Which statement best describes the use of a catalyst in a fuel cell? it reduces waste. it lowers energy requirements. it reduces toxic exhaust. it increases reaction rates.

Option (d) is the correct answer.

Explanation:

A catalyst is a substance that helps in increasing the rate of a chemical reaction without itself getting consumed in the reaction.

Basically, a catalyst decreases the activation energy gap so that molecules with less energy can also participate in the reaction. Hence, rate of reaction increases due to which products are obtained quickly.

Thus, we can conclude that the statement, it increases reaction rates increases reaction rates.

answer; /// i do believe that the correct answer is (a) boiling

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.